Edwin r



UNITED STATES PATENT OFFICE.

EDIVIN R. GREENE, OF PROVIDENCE, RHODE ISLAND.

PlSTON-FAUCET.

SPECIFICATION forming part of Letters Patent No. 586,434, dated July 13, 1897.

Application filed April 6, 1896. Serial No. 586,381. (No model.)

To all whom it may concern:

Be it known that I, EDWIN R. GREENE, of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in PlSt0I1-F&U

cets, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved piston-faucet designed for drawing beer, ale, and other liquids from kegs, barrels, and like receptacles, and arranged to prevent a large amount of liquid from standin g in the metallic faucet and thereby becoming stale or poisonous.

The invention consists of certain parts and details and combinations of the same, as will be hereinafter described, and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement in a closed position. a like view of part of the improvement with the key applied for opening the faucet. Fig. 3 is an end view of the improvement, and Fig. 1 is a perspective view of the key for the piston-rod.

The improved piston-faucet is provided with a cylinder A, formed at its forward open end with an external screw-thread A, adapted to screw into the barrel, keg, or other vessel B, containing the liquid to be drawn, the inward movement of the open end in the head of the barrel being limited by a polygonal collar A as indicated in Figs. 1 and 3. The outer end of the cylinder A is closed by a suitable cap 0, and near this outer end, at the bottom, is arranged an outlet opening A through which the liquid is to pass to a glass or other vessel held below the outlet.

In the cylinder A is fitted to slide a piston D, having its piston-rod E fitted in a bearing 0 in the cap 0, the outer end of the said piston-rod being adapted to be engaged by a key F, adapted to be taken hold of by the operator to move the piston in the said cylinder to bring the piston outward beyond the out let A and permit the liquid to flow from the receptacle B through the cylinderA an d outlet A into the vessel held below the said outlet.

IVhen the faucet is closed, the piston D in Fig. 1, and on the inner endis adapted to rest a collar E, held on the rod E to limit the inward movement thereof. On the extreme outer end of the rod is formed abit E adapted to be engaged by an L-shaped slot F, formed in the key F. By this arrangement the key may be applied on the rod E to pull the latter and the piston D outward past the outlet A so as to permit the liquid to flow from the keg through the outlet to the glass or vessel. When the latter is filled, the operator pushes the key F inward, so as to cause the piston D to force the liquid in the cylinder A back into the barrel, and when the piston finally'arrives in an innermost position then the key can be removed from the piston-rod E to prevent unauthorized persons from manipulating the piston. When the piston is in an innermost position, as shown in Fig. 1, then the outer end of the rod E is within the cup-shaped bearing 0, and this outer end can then only be reached by the key F.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A piston-faucet, comprising the cylinder formed at its inner open end with an exterior screw-thread adapted to engage a keg or receptacle, a collar limiting the inward movement of said end, and an outlet near its outer end, a cap inclosin g the outer end of said cylinder and formed with an inwardly-extending cup-shaped bearing, a piston-rod extending through said bearing to the inner end of the cylinder, a piston on the inner end of said rod, a collar near the outer end of said rod and resting against the inner end of said cup shaped bearing when the piston is flush with the inner end of the cylinder, whereby the cylinder is completely emptied when the faucet is closed, as and for the purpose set forth.

EDWIN R. GREENE.

Witnesses JosEPH B. JOHNSTON, EDWARD J. KEENAN. 

